The density of gold is 19.3 g/cm3. what is the volume of a 13 g gold nugget? (density: d = )

Ans: Volume = 0.674 cm-3

Given:

Density of gold = 19.3 g/cm3

Mass of gold = 13 g

To calculate:

Volume of gold

Explanation:

Density of a given substance expressed as the mass of the substance present in a unit volume

Density = mass/volume

volume = mass/density

            = 13 g/ 19.3 g.cm-3 = 0.674 cm-3

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.